The Zerg actually encompass a multitude of bio-engineered creatures, designed for
maximum killing efficiency. Their hives are also living creatures which slowly infest any
area the Zerg inhabit with "the Creep", a thick blanket of organic matter.
The Zerg are composed of several different types of creatures
that have been integrated into the Swarm by the Overmind.
These creatures, or breeds, have been selectively evolved to
become efficient killers and to assist the Zerg in their quest for
ultimate power. The Zerg do not utilize technology in the
common sense, but their natural weaponry and armor is
comparable to the most advanced gadgetry employed by any
other species. This biological evolution, combined with an
unmatched savagery and their blind devotion to the Overmind,
make the Zerg an extremely formidable and deadly foe.
The Zerg have been found in all types of environments,
including deep space. They have adapted themselves to the
rigors of space travel, although it is not exactly understood how
they are able to do so. The center of a Zerg habitation is the
Hatchery. Their nests are composed of a thick organic matter,
nicknamed the Creep, which provides nourishment for the
Zerg and provides organic mass for Zerg Larvae and Drones
to facilitate their transformation into larger forms. The Creep
expands and covers the area around the Zerg hive, and is very
difficult to eradicate